Two more police officers are to be investigated for gross misconduct as part of an inquiry into how anti-terror legislation was used to spy on former staff and journalists.

The Independent Office for Police Conduct (IOPC) is looking at Cleveland Police's use of the Regulation of Investigatory Powers Act (RIPA).

The force said it would "continue to assist" the watchdog.

The latest announcement brings the total being probed by the IOPC to nine.

One of the two officers has retired and the other is now serving with Northamptonshire Police.

Deputy Chief Constable Simon Nickless was appointed in December, following a secondment to the College of Policing from his substantive role as Cleveland Police's assistant chief constable.

Northamptonshire Chief Constable Nick Adderley said in a statement that Mr Nickless "was completely transparent regarding this matter prior to his application to join Northamptonshire Police and he remains in post".